Question is grammatically similar to this question but different in content.
Apparently, Equanimity is not indifference but a feeling in itself. According to the Note at the bottom of Potaliya Sutta.;
MN 137 (passage § 179 in The Wings to Awakening) identifies "equanimity based on multiplicity" as equanimity with regard to forms, sounds, smells, tastes, and tactile sensations. It identifies "equanimity based on singleness" as the four formless attainments. In the context of this sutta, however, the Commentary defines equanimity based on singleness as the fourth jhana, and this interpretation seems correct. Toward the end of this passage, the equanimity based on singleness functions as the basis for the three knowledges, a function that is normally filled by the fourth jhana.
As I understand, there is Equanimity with regards to sense bases and one generated through Jhnana.
My question is, How to Cultivate this Equanimity wrt multiplicity? Will the one wrt Jhnana get cultivated by itself?
The Indriya-Bhavana sutta mentions it as peaceful and exquisite, does developing that feeling in face of changing circumstances account to equanimity?